3D movies, I remember everyone being so excited for shit like Avatar because it was a 3D movie without the dumb red and blue lenses. Then it turned out to just give you vertigo.
Or even 4K TV. Like it looks marginally better if your face is jammed into the screen, but all it really does is suck up way more bandwidth and cost $400 more.
cubeworld. what a clusterfuck of a game lol. the dev released the alpha. every year or so he'd drop a picture on twitter of what the next update will contain. 6 years later, he releases the finished game that removed many features from the alpha and had maybe 1/5 of the stuff he showed on twitter.
I honestly didn't think that there even was a finished version. I thought it died in alpha.